Method of preparing esters of glycerol and polyglycerols and C5-C9 monocarboxylic fatty acids

Abstract

The method of preparing esters of glycerol and polyglycerols with monocarboxylic fatty acids having from 5 to 9 carbon atoms consists in that glycerol and polyglycerols are reacted with monocarboxylic fatty acids, having from 5 to 9 carbon atoms at a temperature of 140°-210° C with continuous distillation of water that is present in the reaction zone. Glycerol and polyglycerols are introduced into the reaction as part of still bottoms of the process of distillation of synthetic glycerol obtained by the chlorine method, and containing sodium hydroxide and sodium chloride. The resultant reaction mixture contains the end product, which is isolated by any known method.

We claim: 
     
       1. Method of producing esters of glycerol and polyglycerols with C 5  -C 9  monocarboxylic fatty acids which comprises reacting the still residue resulting from the distillation of synthetic glycerol produced by a chlorine method and containing in said residue glycerol, polyglycerols, sodium hydroxide and sodium chloride with C 5  -C 9  monocarboxylic fatty acids at a temperature of 140° - 210° C with continuous distillation of water present in the reaction zone, thus forming a reaction mixture containing the corresponding esters, and isolating said esters from the reaction mixture. 
     
     
       2. The method of claim 1, wherein said still residue before being reacted with C 5  - C 9  monocarboxylic fatty acids, is processed with water taken in the weight ratio of still residue to water of 3-5 : 1 and, then with a reagent selected from the group consisting of hydrochloric acid and hydrogen chloride to pH of the medium of 7.1 - 10, which subsequent removal of precipitated sodium chloride. 
     
     
       3. The method of claim 1, wherein the reaction of said glycerol and polyglycerols with C 5  - C 9  monocarboxylic fatty acids is carried out in the presence of activated carbon taken in the quantity of 0.1 - 2 percent of the weight of the mixture of the starting reactants.